Vintage Awesome Griswold Heat Regulator # 300 For Sale

you are offerding on a vintage griswold heat regulator made by the griswold mfg,co. erie pa. u.s.a. # 300 as shown in the photos, diameter measures--7 1/2 " a very nice cast iron griswold item. add $ 9.95 to the total amount for shipping u.s.a thanks for looking! B.P.R